We have all of the sizes below in both Ambient & Climate controlled units.

5'x5' (25 sq. ft.) Accommodates several boxes and other small items. Comparable to a small half bathroom.
5'x10' (50 sq. ft.) Accommodates couch, chair, chest of drawers. Comparable to a walk-in closet.
5'x15' (75 sq. ft.) Accomodates the size of a small bedroom with light storage items, large dining sets, and washer/dryer.
10'x10' (100 sq. ft.) Accommodates furnishings for a one bedroom apartment with appliances. Comparable to a mid-size bedroom.
10'x15' (150 sq. ft.) Accommodates furnishings for a two bedroom apartment or a small house without appliances. Comparable to a large bedroom.
10'x20' (200 sq. ft.) Accommodates furnishings for a small house with appliances, or a car or small truck. Comparable to a small one car garage.
10'x30' (300 sq. ft.) Accommodates furnishings for a three bedroom house. Will hold the contents of a 40-foot moving van. Comparable to an extra long garage.